Clandestine romance provides sad but pleasurable viewing in the high-quality Hong Kong meller “Claustrophobia.” Helming bow of Hong Kong scripting vet Ivy Ho (“Comrades, Almost a Love Story,” “Divergence”) has a mastery that recalls Eric Rohmer and Woody Allen at their most sublime. Offering fine drama about and for adults, pic will make a prestige inclusion for fests. Commercial possibilities exist for industrious distribs willing to guide sophisticated auds away from the usual arthouse milieus.